I'm of that vintage of credit card user that remembers this. I used to keep my counterfoils (I think that's what they were called) to reconcile what was remaini

I'm of that vintage of credit card user that remembers this. I used to keep my counterfoils (I think that's what they were called) to reconcile what was remaining on my available credit. I seem to remember there was a printed list of that some merchants used to look up invalidated cards before electronic terminals replaced mechanical card swipe machines.